I've had my 76cm roof dish pointed to 125 for some time now. The Montana PBS transponder 11917 V 2398 seems to be the stronger of the active transponders on this satellite (the other being 12181 V 30000 of course). Once I peak 12181 V 30000, I get video choppiness on Montana PBS, even with my receiver showing full signal. It's almost like I can't peak them both to a happy medium; it's one or the other. I've found a "sweet spot compromise" where the choppiness on Montana PBS is minimal, but I can't seem to eliminate it completely without hurting the PQ on the national PBS feeds. Is this a common issue on this satellite?